Used to be the sock hanger, but since Mumsnet made me buy an ikea Socktopus, I'm now eagerly awaiting my cheapy Morrisons version to break so I can get another Socktopus so the one we already have can have a friend.
The ikea ones are slightly more expensive but so much better made than those in Wilkos, pound shops etc, so hopefully they will last longer as we've had loads of cheap ones over the years and all the little pegs eventually fall off.